47720517 has 8 divisors (see below), whose sum is σ = 68521824. Its totient is φ = 29366448.

The previous prime is 47720467. The next prime is 47720537. The reversal of 47720517 is 71502774.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47720517 - 2⁸ = 47720261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47720537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611763 + ... + 611840.

It is an arithmetic number, because the mean of its divisors is an integer number (8565228).

Almost surely, 2^47720517 is an apocalyptic number.

It is an amenable number.

47720517 is a deficient number, since it is larger than the sum of its proper divisors (20801307).

47720517 is a wasteful number, since it uses less digits than its factorization.

47720517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223619.

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 47720517 is about 6908.0038361310. The cubic root of 47720517 is about 362.7173919183.

The spelling of 47720517 in words is "forty-seven million, seven hundred twenty thousand, five hundred seventeen".